Google Chrome Window Object Suppressing Remote Denial of Service.

*Version Affected:*
Chrome/0.2.149.30
Chrome/0.2.149.29
Chrome/0.2.149.27

*Severity:*
High

*Description:*
The Google chrome browser is vulnerable to window object based denial of
service
attack. The Google Chrome fails to sanitize a check when window.close()
function is
called in body upload. The function is called in a suppressed manner and
kills the
parent window directly by default which makes it vulnerable to denial of
service attack.
This inability of Google Chrome diversifies the attack pattern as number
of events can
execute this  function without a security check,prompting a user to
allow the event to trigger.

This security issue is a result of design flaw in the browser as
function show
stringent behavior in many cases. .Scripts must not close windows that were
 not opened by script,if script specific code is designed. There must
be a parent
window confirmation check prior to close of window.

*POC:
http://www.secniche.org/gws/poc.html
*
/NOTE: If this page is opened in Google Chrome , You need to open this
POC in
new window to see the killing of parent window. You can even use a Sub
Tab in this.
/
*Links:*
http://www.seniche.org/advisory.html
http://www.evilfingers.com/advisory/

*Detection:*
SecNiche confirmed this vulnerability affects Google Chrome on
Microsoft Windows XP SP2 platform.The versions tested are:

Chrome/0.2.149.30
Chrome/0.2.149.29
Chrome/0.2.149.27

*Disclosure Timeline:*
Disclosed: 25 September 2008
Release Date. September 27 ,2008

*Vendor Response:*
Google acknowledges this vulnerability as security bug
and "fix" will be released soon.

*Credit:*
Aditya K Sood

*10. Disclaimer*
The information in the advisory is believed to be accurate at the time
of publishing
based on currently available information. Use of the information
constitutes acceptance
for use in an AS IS condition. There is no representation or warranties,
either express or
implied by or with respect to anything in this document, and shall not
be liable for any
implied warranties of merchantability or fitness for a particular
purpose or for
any indirect special or consequential damages.

<html>
<head>
<title>Google Chrome Window Object Suppressing Remote Denial of Service.</title>
</head>


<body onLoad="window.close();">
<center>
<b>Note: Design Flaw.Zero Security Check. Script Can Be Used to Kill Parent Window Directly Leading to Denial of Service.</b><br><br>
</center>
</body>
</html>

# milw0rm.com [2008-09-28]
